Novel N-Linked Aminopiperidine Inhibitors of Bacterial Topoisomerase Type II with Reduced p<i>K</i><sub>a</sub>: Antibacterial Agents with an Improved Safety Profile
作者:Folkert Reck、Richard A. Alm、Patrick Brassil、Joseph V. Newman、Paul Ciaccio、John McNulty、Herbert Barthlow、Kosalaram Goteti、John Breen、Janelle Comita-Prevoir、Mark Cronin、David E. Ehmann、Bolin Geng、Andrew Aydon Godfrey、Stewart L. Fisher
DOI:10.1021/jm300690s
日期:2012.8.9
for the development of new antibacterial agents that are not impacted by target-mediated cross-resistance with fluoroquinolones. N-Linked amino piperidines, such as 7a, generally show potent antibacterial activity, including against quinolone-resistant isolates, but suffer from hERG inhibition (IC50 = 44 μM for 7a) and QT prolongation in vivo. We now disclose the finding that new analogues of 7a with
新型的细菌II型拓扑异构酶的非氟喹诺酮抑制剂(DNA促旋酶和拓扑异构酶IV)对于开发不受靶标介导的氟喹诺酮类交叉耐药性影响的新型抗菌剂具有重要意义。N-连接的氨基哌啶,例如7a,通常显示出强效的抗菌活性,包括对喹诺酮类耐药菌的隔离,但在体内受到hERG抑制作用(7a的IC 50 = 44μM)和QT延长。现在我们公开了以下发现,即新的类似物7a中具有降低的p ķ一个由于与取代在哌啶部分的吸电子取代基,如- [R ,小号-在图7c中,保留了7a的革兰氏阳性活性,但是显示出显着较少的hERG抑制(对于R,S - 7c,IC 50 = 233μM)。该化合物在狗中表现出中等清除率,在小鼠感染模型中有望对抗MRSA毒株,并且在豚鼠体内模型中测得的体内QT曲线得到改善。由于其有希望的活性,R,S -7c已进入I期临床研究。